마이크로중력 과학 임무 수행용 초소형위성의 시스템 설계 및 개발

Abstract

KMSL (Korea Microgravity Science Laboratory) is a 3U nanosatellite designed for the purpose of carrying out two scientific missions: combustion and biological experiments in extreme space environments such as microgravity, absolute vacuum and cosmic radiation. In addition, one of the primary goals for the KMSL missions is related to replace the satellite avionics which are heavily dependent on overseas products with domestic ones by verifying their operational performance in the space environment and successfully performing all the tasks with the KMSL nanosatellite. By doing so, the ultimate goal is to build a platform on which scientific experiments can be performed in space for the future. In order to design the KMSL nanosatellite to perform two scientific missions, mission and system requirements were derived. The system was then designed based on the derived requirements described in the present study. Following the requirements listed, the interface and margin analysis were performed in order to design and implement each of subsystems which complies with the requirements. The designed and implemented system to meet such requirements was verified through structural analysis, orbital thermal analysis, attitude control simulation, and power simulation. A engineering model (EM) of the KMSL satellite (that are built following all the requirements and analysis results) has been verified through a series of tests such as Electrical test bed test, environmental test (vibration and thermal vacuum tests). The implemented EM in the present study was found to verify the function and performance requirements The information described in the present study will be used as a reference for future final flight model (FM) development.